Don't know the difference between a tree lopper and an Arborist?

https://nanohub.org/members/237786/blog/2019/07/how-to-tell-the-difference-between-at-tree-lopper-and-an-arborist

One of the very pressing needs after a thunderstorm is to have the branches and leaves of the trees in a compound trimmed. Here a differentiation must be manufactured involving the Arborist and the tree lopper